Today, it's April Fool's day. I had to take a CPR class, and everything was going well. We took a break and I went to get a drink of water and started choking. They thought I was making fun of the class, and made me leave. FML

While drinking water epiglottis closes to block tracheal (windpipe) opening so that water dont go inside.But for many reason like trying to speak or lost in other thoughts while drinking can result in choking.Usually person experience paroxyms of cough and get relieved but can be dangerous in kids and person of old age.